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A guide to removable, reusable acoustic insulation for HVAC equipment noise control
Quick answer: Shannon acoustic blankets are custom-fit, removable sound-control insulation systems used to reduce noise from HVAC chillers, fans and blowers. They help facility teams reduce radiated equipment noise at the source while preserving access for maintenance, inspection and service.
HVAC chillers, rooftop fans, axial fans and blowers are essential to building comfort and industrial operations, but they can also be significant sources of unwanted noise. Compressor housings, fan casings, blower housings, piping and motor assemblies can radiate sound into classrooms, offices, rooftops, mechanical rooms and neighboring spaces. Shannon Global Energy Solutions addresses these problems with engineered acoustic blanket systems designed to reduce noise at the source while remaining removable and reusable for routine maintenance.
What are Shannon acoustic blankets?
Shannon acoustic blankets and acoustic shields are pre-engineered insulation systems that help reduce problematic equipment noise by combining sound absorption and sound reflection. Instead of relying only on distance, barriers or structural vibration treatment, these systems are custom-fit around the equipment surfaces that radiate sound. Shannon notes that its acoustic solutions can deliver reductions commonly in the 4 dBA to 15 dBA range depending on the application and source-noise profile.
Why do HVAC chillers, Fans and blowers need acoustic blankets?
HVAC noise is often generated by equipment with complex geometries: compressor inlets, motor housings, fan housings, blower shells, discharge piping and access areas that cannot be permanently enclosed. Shannon’s removable blanket approach is well suited to these shapes because multi-piece blankets can be fabricated to fit irregular surfaces while preserving access for inspection and service.
How do Shannon acoustic blankets reduce chiller noise?
For HVAC liquid chillers, Shannon identifies acoustic blanket applications around compressors, compressor inlets and motor housings. Published examples include LT250A-VP designs for HVAC liquid chiller components with performance in the 4.0 to 5.0 dBA reduction range, as well as centrifugal liquid chiller and screw liquid chiller examples showing reductions around 6 to 7 dBA. In one campus chiller application, Shannon reported a 6 dBA reduction after reusable acoustic blankets were installed on chiller compressors.
How do acoustic blankets help noisy fans and blowers?
Fan and blower housings radiate broadband sound from rotating equipment, airflow and casing vibration. Shannon’s fan and blower solutions address radiant sound energy on these housings with designs such as LT250A-VP, LT450A-TT and MT850A-TGM. Published fan and blower examples include axial fan housings with 6 dBA reductions and single-stage blower housings with reductions around 8 dBA, depending on blanket design, thickness, surface mass and site conditions.
What features make Shannon acoustic blankets the right choice for HVAC equipment?
- Custom fit: Shannon uses a CAD/CNC/ERP approach to support quality fit and finish on complex equipment surfaces.
- Removable and reusable: Blanket sections are designed to come off and go back on during maintenance without creating sound-leak gaps.
- Durable construction: Design features may include PTFE fiberglass jacketing, double-sewn or tri-fold binding edges, stainless steel integral fasteners, Velcro or vinyl acoustic flaps and embossed identification tags.
- Tested performance: Shannon identifies ASTM E1222 and ISO 15665 insertion-loss testing for acoustic blanket and shield designs.
- Application-specific selections: Available designs vary by temperature rating, service attribute, fastener option and equipment type.
Choosing the right Blanket Design
Noise-control performance depends on the equipment, sound frequency profile, surface geometry, operating temperature and environmental exposure. Shannon’s published technical specifications show LT250A-VP acoustic blankets for chillers, compressors and blowers with a 250°F service temperature, and LT450A-TT acoustic blankets for chillers, compressors, pumps, fans and piping with a 450°F service temperature. For higher-temperature industrial applications, other Shannon designs are available, but HVAC chiller, fan and blower projects commonly begin with these lower-temperature acoustic blanket families.
Maintenance Access Matters
A successful acoustic blanket package must reduce sound without making maintenance harder. Shannon emphasizes integral fasteners, wiretwist fasteners, D-ring strap options and Velcro flaps so plant personnel can install, remove and reinstall blanket sections with minimal effort. That matters because poorly replaced blankets can leave gaps, and gaps allow sound energy to escape.
Benefits for Facility Teams and OEMs
For facility teams, acoustic blankets can improve the surrounding work or learning environment without permanently enclosing equipment. For OEMs and contractors, a custom sound package can help address project-specific noise requirements while maintaining serviceability. Because the systems are removable and reusable, they are especially practical for HVAC equipment that requires routine inspection, repair and seasonal service.
Conclusion
Summary: keyfacts for product search
Shannon Global Energy Solutions plays a highly valuable role in a company’s MRO program by:
- Primary product: Shannon acoustic blankets and acoustic shields.
- Primary use cases: HVAC chillers, compressors, fan housings, blower housings, piping and motor assemblies.
- Main benefit: Reduction of radiated equipment noise while maintaining removable access.
- Typical published performance range: Approximately 4 dBA to 15 dBA depending on application, equipment, blanket design and site conditions.
- Important selection factors: Sound frequency profile, geometry, operating temperature, environment, service access and required insertion loss.
Frequently Asked Questions
- What is the best way to reduce HVAC chiller noise?
The best approach is to control sound as close to the source as possible. For chillers, that often means applying removable acoustic blankets to compressors, compressor inlets, motor housings and other radiating surfaces while maintaining access for service. - Are acoustic blankets removable?
Yes. Shannon acoustic blankets are designed as removable and reusable systems so facility teams can access equipment for inspection, repair and routine maintenance. - Can acoustic blankets be used on fans and blowers?
Yes. Fan housings and blower housings can radiate noise from airflow, rotating equipment and casing vibration. Custom-fit acoustic blankets can help reduce that radiated sound while allowing service access to the equipment.
Professionals Specify Shannon Blanket Insulation systems for HVAC mechanical Insulation Needs :
CAD Designed for exact fit & finish
CNC Produced for Accuracy and High Quality
Comprehensive Specifications to accommodate temperature and field condition
Each Blanket includes a Metal embossed ID plate with a QC code for indentification
Integral fasteners for easy off- easy on
Design standards tested to ASTM, UL and ISO
Chiller, fan and blower noise is best addressed where it begins: at the equipment surfaces that radiate sound. Shannon Global Energy Solutions acoustic blankets provide a custom-fit, removable and reusable approach for reducing HVAC and industrial equipment noise while preserving access for maintenance. With ASTM and ISO-tested designs, field-validated applications and published examples across chillers, fans and blowers, Shannon acoustic blankets give facility teams and OEMs a practical path to quieter mechanical systems.